Cambium Networks PMP 450 AP, Configuration Manual

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Chapter 1: Configuration Configuring synchronization
Page
1-108
When an AP/BHM has its "Regional Code" set to "None", The radio will not provide valid
Sync Pulse Information.
There is a RED warning that the radio will not transmit, but the user might expect to see a
valid sync if the radio is connected to a working CMM4 or UGPS.
Free Run Before GPS Sync
This option is available when the Sync Input parameter is configured for either AutoSync mode or
Au Free Run mode. When
Free Run Before GPS Sync
is set to Enabled, if the radio does not detect
a valid GPS synchronization pulse after booting up then it will operate in Generate Sync – Free Run mode
until a valid source is detected. While the AP/BHM is in Generate Sync – Free Run mode SMs/BHS will be
able to register, but there is no synchronization of APs/BHMs that can “hear” each other; the AP/BHM will
only generate a sync signal for the local AP/BHM and its associated SMs/BHS. Once a valid
synchronization source is found, the AP/BHM automatically switches to receiving synchronization from
the source and SM/BHS registration is maintained. If
Free Run Before GPS Sync
is set to Disabled, the
AP/BHM does not transmit and SMs/BHS will be unable to register until a valid GPS synchronization
source is connected.
Device Type
This parameter determines whether the device is configured as a Remote AP, receiving GPS sync from a
co-located AP GPS sync output or Remote Device feed from a registered SM’s GPS sync output, or as a
Standard AP. This parameter applies in AutoSync or Au Free Run modes only. Synchronization
behavior is as follows:
Standard: The AutoSync mechanism will source GPS synchronization from the AP’s Aux/Timing port,
the AP’s power port, or from the device on-board GPS module (if present).
Remote: The AutoSync mechanism will source GPS synchronization from the AP’s Aux/Timing port or
from the device on-board GPS module (if present). GPS synchronization pulses on the Power Port are
ignored.
Verify GPS Message Checksum
The Verify GPS Message Checksum parameter enables or disables validation of incoming GPS location
messages from a UGPS or cnPulse module connected to the AP’s Aux Port. When enabled the AP will
discard messages found to have an incorrect checksum and will increment the Invalid Message Count
display of the Sync Status tab of the Home GUI page accordingly.
Sync Aux Port Config
The Sync Output to Aux Port parameter takes effect when the AP is operating in either AutoSync or
Au Free Run modes. When enabled, the AP will output the GPS timing pulse on the Aux/Timing
Port. In this configuration the AP may serve as a GPS synchronization source for a co-located AP.